Air Resources Branch, British Columbia Ministry of Water, Land, and Air Protection
Information on major air quality issues, from local to global, including vehicle emissions, stratospheric ozone depletion, industrial emissions, and particulates. Site hosted by the Air Resources Branch of the Government of British Columbia, Canada.

AIR Web
Air quality and visibility in U.S. national parks, refuges, and other protected areas. From National Park Service Air Resources Division and Fish and Wildlife Services.

AIRNOW - U.S. EPA
Air pollution data, ozone forecasting, information about public health and environmental effects of air pollution, and actions you can take to reduce pollution.

Atmospheric Research & Information Centre,
Manchester Metropolitan University's multidisciplinary centre of excellence for the study and resolution of atmospheric pollution issues. United Kingdom.

Automobile Emissions: An Overview
U.S. EPA fact sheet. [PDF format]

Bay Area Air Quality Management District
The BAAQMD (District) is the regional, government agency that regulates sources of air pollution within the nine San Francisco Bay Area Counties.

California Air Resources Board
CA air regulations, CA Almanac of Emissions and Air Quality, air emissions modeling, the gasoline additive MTBE, information on reducing air pollution from marine engines, and management of smoke from agricultural burning.

Canada's Toxic Release Inventory
Information about releases of pollutants into air, water and land. From Environment Canada.

Chicago Department of Environment
Gives information on Chicago's air quality and regional pollution prevention programs.

Clean Air Canada
Up to date information on air quality issues in Canada. Including environmental law and policy, motor vehicle emissions and industrial sources of pollution. Maintained by students at the Environment Law Centre, University of Victoria.

Clean Air Society of Australia and New Zealand
Focus is air quality and the mechanics of air pollution. Information about publications, training courses, conferences, and seminars.

Clean Air Task Force
A nonprofit organization dedicated to restoring clean air and healthy environments in the United States through scientific research, public education, and legal advocacy.

Denver Vehicle Emissions Testing Program
Describes the mandatory vehicle emissions testing program in the Denver-Boulder area of Colorado, including maps to emissions stations, testing requirements, help for failing vehicles and tips to keep from becoming a gross polluter.

DieselNet: Diesel Emissions Online
Information service on diesel exhaust emissions, emission control technologies, diesel engines, fuels, and related topics.

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